<template>
  <el-card shadow="always" :body-style="{ padding: '20px' }">
    <el-form :inline="true" class="demo-form-inline" :disabled="disable">
      <el-form-item label="一级分类">
        <!-- 
          在select中，如果想要显示option，select必须有双向绑定一个值，值是下边所有option的某个一个value属性值（收集的是value属性值）
         -->
        <el-select placeholder="请选择" v-model="(category1Id as number)" @change="category1Change">
          <el-option v-for="item in categoryList1" :label="item.name" :value="item.id" :key="item.id" />
        </el-select>
      </el-form-item>
      <el-form-item label="二级分类">
        <el-select placeholder="请选择" v-model="(category2Id as number)" @change="category2Change">
          <el-option v-for="item in categoryList2" :label="item.name" :value="item.id" :key="item.id" />
        </el-select>
      </el-form-item>
      <el-form-item label="三级分类">
        <el-select placeholder="请选择" v-model="(category3Id as number)">
          <el-option v-for="item in categoryList3" :label="item.name" :value="item.id" :key="item.id" />
        </el-select>
      </el-form-item>
    </el-form>
  </el-card>

  <button></button>
</template>

<script lang="ts">
import { defineComponent } from "vue";

export default defineComponent({
  name: "",
});
</script>

<script setup lang="ts">
import type { reqCategoryType, reqCategoryItemType } from "@/api/attr";
import { onMounted } from "vue";
import { storeToRefs } from "pinia";
//引入attr的仓库
import useAttrStore from "@/stores/attr";
defineProps<{ disable: boolean }>()
//获取attr仓库实例对象
const attrStore = useAttrStore();
//接受attr仓库中的state数据
const {
  categoryList1,
  category1Id,
  categoryList2,
  category2Id,
  categoryList3,
  category3Id,
} = storeToRefs(attrStore);

//初始化操作
onMounted(() => {
  //调用store中的方法,发送1级分类请求
  attrStore.getCategory1();
});

//一级分类被选择后,处理二级分类请求
const category1Change = () => {
  //先清空二级和三级的所有数据
  categoryList2.value = [];
  category2Id.value = null;
  categoryList3.value = [];
  category3Id.value = null;
  //调用store中的方法,发送2级分类请求
  attrStore.getCategory2();
};

//二级分类被选择后,处理三级分类请求
const category2Change = () => {
  //先清空三级的所有数据
  categoryList3.value = [];
  category3Id.value = null;
  //调用store中的方法,发送3级分类请求
  attrStore.getCategory3();
};
</script>
